'''Theora''' is our video codec, based on the [[VP3]] codec donated by [[On2 Technologies]]. We've refined and extended it, giving it the same future scope for encoder improvement [[Vorbis]] has. See http://theora.org/ for more information.

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'''Theora''' is a video codec, based on the [[VP3]] codec donated by [[On2 Technologies]]. We've refined and extended it, giving it the same future scope for encoder improvement [[Vorbis]] has. See http://theora.org/ for more information.

== Features ==

== Features ==

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Features available in the Theora format (and a comparison to VP3 and MPEG-4 ASP):

Features available in the Theora format (and a comparison to VP3 and MPEG-4 ASP):

* technologies used already in Vorbis (decoder setup configuration, bitstream headers...) not available in VP3

* technologies used already in Vorbis (decoder setup configuration, bitstream headers...) not available in VP3

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Note that not all of these features are already implemented in the reference encoder/decoder.

== Status ==

== Status ==

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* Beta 2 is the latest stable release (2007-Okt-12).

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* '''1.1.1''' is the latest stable release (2009-10-01).

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* The bitstream format was frozen in Theora alpha 3: every file created with this encoder (and, of course, later encoders) will be playable by any compliant Theora decoder.

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* The bitstream format was frozen in 1.0 Alpha 3 on 2004-08-04: every file created with this encoder (and, of course, later encoders) will be playable by any compliant Theora decoder.

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* The decoder in 1.0 Alpha 8 implemented all features of the [http://theora.org/doc/Theora.pdf Theora Format Specification]: every file created by any compliant Theora encoder will be playable by the decoder in 1.0 Alpha 8 (and, of course, later decoders).

== Development ==

== Development ==

* [[OggTheora|Mapping in Ogg]]

* [[OggTheora|Mapping in Ogg]]

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* [[TheoraTodo|Todo list for development]]

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* [[TheoraTodo|ToDo list for development]]

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* [[Cortado/release|Release checklist for the Cortado java applet]]

== More information ==

== More information ==

Revision as of 15:12, 7 July 2010

Theora is a video codec, based on the VP3 codec donated by On2 Technologies. We've refined and extended it, giving it the same future scope for encoder improvement Vorbis has. See http://theora.org/ for more information.

technologies used already in Vorbis (decoder setup configuration, bitstream headers...) not available in VP3

Status

1.1.1 is the latest stable release (2009-10-01).

The bitstream format was frozen in 1.0 Alpha 3 on 2004-08-04: every file created with this encoder (and, of course, later encoders) will be playable by any compliant Theora decoder.

The decoder in 1.0 Alpha 8 implemented all features of the Theora Format Specification: every file created by any compliant Theora encoder will be playable by the decoder in 1.0 Alpha 8 (and, of course, later decoders).